reply from tech support about banding
Thank you for providing the sample images Nick requested.
Looking at the pushed image I can see the banding you are referring to. Doing some testing here produced similar results when trying to push the exposure and gamma curves of an image too far, but as noted the banding only shows up when the exposure/gamma is pushed heavily.
I would like to take a look at the RAW file directly from the camera to take a more detailed look at the file. Please provide a link to the unaltered RAW file for review.
Also, what method is being used to transfer the files to your computer, and what software is being used to view/process the files?
I look forward to your reply with the information I have requested.
Thank you for choosing Canon.
Technical Support Representative
im getting all this ready for them
Have you tried processing the same file in DPP? Might just be worth a try...